package cn.ecut.dzy.lock;

/**
 * @program: java-interview
 * @description:Synchronized 和 Lock的区别
 * @author: DingZhenYun
 * @create: 2021-10-25 11:28
 **/

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * 题目：多线程之间按顺序调用，实现A->B->C三个线程启动，要求如下：
 * AA打印5次，BB打印10次，CC打印15次
 * 紧接着
 * AA打印5次，BB打印10次，CC打印15次
 * .....
 * 来10轮
 */
class ShareResource1 {
    private int number = 1;
    private Lock lock = new ReentrantLock();
    // 这三个相当于备用钥匙
    private Condition condition1 = lock.newCondition();
    private Condition condition2 = lock.newCondition();
    private Condition condition3 = lock.newCondition();


    public void print(){
        lock.lock();
        try {
            if(number==1){
                //干活
                for (int i = 0; i < 5; i++) {
                    System.out.println(Thread.currentThread().getName() + "\t " + number + "\t" + i);
                }
                // 唤醒 （干完活后，需要通知B线程执行）
                number = 2;
                condition2.signal();
            }else if(number==2){
                //干活
                for (int i = 0; i < 10; i++) {
                    System.out.println(Thread.currentThread().getName() + "\t " + number + "\t" + i);
                }
                // 唤醒 （干完活后，需要通知B线程执行）
                number = 3;
                condition3.signal();

            }else if (number==3){
                //干活
                for (int i = 0; i < 15; i++) {
                    System.out.println(Thread.currentThread().getName() + "\t " + number + "\t" + i);
                }
                // 唤醒 （干完活后，需要通知B线程执行）
                number =1;
                condition1.signal();
            }else {
                System.out.println("你是不是傻逼啊");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }
}

public class SyncAndReentrantLockDemo1 {
    public static void main(String[] args) {

        ShareResource1 shareResource = new ShareResource1();

        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                shareResource.print();
            }
        }, "A").start();

        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                shareResource.print();
            }
        }, "B").start();

        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                shareResource.print();
            }
        }, "C").start();
    }
}
